工程科学学报2017，Vol.39Issue(9)：1295-1304,10.DOI:10.13374/j.issn2095-9389.2017.09.001
考虑岩石交界面方向效应的巴西劈裂试验研究
Experimental study of directivity effect of rock interface under Brazilian splitting
摘要
Abstract
A series of Brazilian split tests on rock-cement interface considering the effect of interface orientations were conducted to investigate the influence of hard rock- soft rock interface direction on failure behavior. The tensile strength for different interface orientations was obtained and failure mechanism of the interface was analyzed by the particle flow code PFC2D . The measured tensile strength increases as the interface-loading angle increases. The measured tensile strength can be considered to be equivalent to that of the interface if the interface orientation is parallel to the loading direction, because tensile failures occur along the interface. Mixed-mode failures occur if the interface is not parallel to the loading line. In addition, another series of Brazilian tests were conducted to investigate the influence of the interface tensile strength on failures by increasing the cement dosage and roughening the rock surface. Based on the results, a diagram of the failure mode distribution marked with the typical failure patterns from the Brazilian test results for the rock-cement interface was developed. These findings provide a better understanding of the failure modes of the hard rock-soft rock interface.关键词
岩石力学/岩石交界面/巴西劈裂/断裂形式Key words
rock mechanics/rock interface/Brazilian split/fracture modes分类
建筑与水利引用本文复制引用
李夕兵,罗琳,黎崇金..考虑岩石交界面方向效应的巴西劈裂试验研究[J].工程科学学报,2017,39(9):1295-1304,10.基金项目
国家重点研发计划资助项目(2016YFC0600706) （2016YFC0600706）
中南大学中央高校基本科研业务费专项基金资助项目(2017zzts166) （2017zzts166）
